Popular snacks carrying carcinogens

Scout Impact

Acrylamide forms when starchy food is fried or baked. Glycidyl esters come in with refined seed and palm oils. Both are probable human carcinogens, and neither appears on a label. Consumer Reports measured both in 14 popular snacks: in a single serving most carry many times California's no-significant-risk level for acrylamide, one had neither contaminant detected, and a granola bar carried more acrylamide than any chip. Scores are unchanged.

Key Findings

• Acrylamide was detected in 13 of the 14 snacks tested for it; per label serving the highest were Nature Valley Oats 'n Honey (240 ppb, 10.1 mcg), Lay's Classic (263 ppb, 7.37 mcg) and Snyder's Mini Pretzels (160 ppb, 4.48 mcg)
• Glycidyl esters were found in 10 of 14 — highest in gimMe seaweed (153 ppb), Takis Fuego (122 ppb, 3.41 mcg per serving) and Doritos Nacho Cheese (102 ppb), the products fried in refined seed and palm oils
• Against California's no-significant-risk levels (0.2 mcg/day acrylamide, 0.54 mcg/day glycidol), CR's threshold for concern at one serving a day, every chip and cracker except Pirate's Booty exceeded the acrylamide level in a single serving
• 3-MCPD, a companion by-product of oil refining, was highest in gimMe seaweed (207 ppb) and Takis Fuego (160 ppb); it was not detected in the pretzels, graham crackers or three of the four bars
• CR's serving advice: 'very rarely, at most twice a month' for Lay's, Snyder's, Annie's Cheddar Bunnies and Nature Valley; 'rarely, a few times a month' for Takis, Doritos, Goldfish, Wheat Thins and Clif Zbar; 'one per day is fine' for Pirate's Booty
• Heavy metals and phthalates were measured in all 21 products as well — those rows live on each product's own page; this spotlight covers the two cooking- and refining-formed contaminants

Limitations

• Three samples per product from two to three lots — a snapshot of what was on shelves in summer 2026, not a production history
• The U.S. has no limits for acrylamide or glycidyl esters in snacks; the Prop 65 no-significant-risk levels CR used correspond to a one-in-100,000 lifetime cancer risk and are far stricter than the EU's manufacturing benchmarks, so 'exceeds' marks a conservative line, not an acute hazard
• CR's 1–5 ratings are relative across the products tested; the per-serving amounts here are the comparable numbers
• Acrylamide forms in home cooking too (toast, roasted potatoes, coffee) — these snacks are contributors, not the whole exposure